High-pressure plug-cock.



UNITED STATES THOMAS BERNARD DORNIN, OF NORFOLK,

VIRGINIA, ASSIGNOR 'IO THE H. MUELLER MANUFACTURING COMPANY, 0F DECATUR, ILLINOIS, A CORPORATION OF ILLI- NOIS.

HIGH-PRESSURE PLUG-COCK.

To all whom t may concern exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention `is a high pressure plug cock designed more particularly for service in connection with water, gas, or other Huid mains, although the device is equally applicable to any service which requires a side outlet cock, capable of being opened and closed.

Corporation cocks for use in connection with mains carrying fluids under pressure are generally made of comparatively expensive material, and at considerable labor in their construction to insure tightness of the parts for preventing leakage of the fluid through the cock. One-otI the most satisfactory corporation cocks now in use, in addition to the cost of manufacture in -material and labor, requires additional labor of the workmen inmaking connections to the branch pipe and the like, in the insertion of a bent union coupling.

A tapping machine is commonly employed in connection with a corporation cockto drill a hole into a main carrying fluid under pressure, thread the hole so bored, prevent the rush of water or gas from the main, and thereafter insert a cock into the threaded hole.

After a corporation cock has been once installed and opened, -it usually remains open for its entire life, as it is 'customary to provide a suitable cutting-of cock in the branch pipe leading to a building. However, in the event of a break in the branch pipe between the corporation cock and the cut-0E cock, it is necessary that the corporation cock be so constructed that it may cut off the flow of Huid from the main and thereby permit the making of necessary repairs. As such occurrences arev rare, it is obvious that a fitting which will fulil the requirements, which can be applied to mains or vessels containing fluid under pressure in a closed position, 'and which can be opened after the branch pipe has been run,

Specification of Letters Patent.

Application tiled- M-arch 8, 1913.

Patented Julie 9, 1914.

Serial No. 753,035.

which permits also of the flow of fluid being shut olin when desired, will satisfactorily serve all purposes of the-expensive devices now employed.

The corporation cocks with which I am familiar depend for their tightness upon a planed or ground joint between the body of the cock and the plug or key thereby requirlng the device to be made of a high grade composition of metals and of considerable weight. These cocks are frequently made, also, with an outlet passage at the top, thereby requiring a bent union cou pling to connect the cock with a branch pipe. The great number of parts of the cock, its expensive material, together with the manner of coupling entails considerable labor and expense upon a corporation and its patrons in the installation ofservice connections.

The main object of my invention, theretore, is to so simplify the construction 'and operation of my pressure plug cock that it can be made with less labor and less material than the types of corporation cocks now ordinarily employed. Moreover, the invention may be inserted by any of the usual type of tapping machines on the market, and requires no special construction of the parts of such machine. Owing to the constructionoil the device, it can be made of less expensive material and. at the same time render a serviceequal to, if not greater than, the corporation .cocks now employed and with less labor 4to the operator. Furthermore, the constructionv of the valve eliminates the disadvantage of leakingl joints.

A further object of the invention resides in the construction and arrangement of parts hereinafter described Vand specified' in the appended claims, whereby the device may not only be readily applied to a main but renders the work of connecting the branch pipe less laborious. y

One embodiment of the invention is illusn trated in the accompanying drawings but 'the construction therein is to be understood as illustrative only and notl as defining the limits of the invention.

Figure 1 is a side elevation showing the plug cock applied to amain. Fig. 2 is a plan view of the plug cock. Fig. 3 is a longitudinal sectional view on the line 3-3 of Fig. 2.. Fig. 4 is an end view. Fig. 5

is a detailed sectional view through the plug valve. Fig. 6 is a side elevation of an oped to engage a threaded opening in a main,

indicated at 13. This inlet end of the. cock is preferably tapered as shown in Fig. 3, as is usual with corporation cocks of this type. The casing is provided with an opening throughout its length extending from the inlet end 11 to the adjusting end 14 thereof, a portion of this opening being screw threaded, as indicated. The casing is provided, also, with an arm'15 having an openin 16 serving as the outlet opening to the coc This opening 16 is at right angles to the lower opening through the casing. The arm 15 may be either externally or internally threaded to receive a service pipe to the building and thereby eliminate the ordinary bent union coupling now frcquently employed. The casing, t erefore, is provided with three openings, 11, 14 and .16. The end adjacent to the opening 14, which is designated at 17 may be interiorly or exteriorly screw threaded to facilitate its adjustment in the tapping machine. The outer surfaces thereof may be provided with a hexagonal portion 18 permitting the cock to be screwed tightly into the main by an ordinary wrench after the tapping machine has been removed. The main'passage indicated at A through the cock is preferably not threaded at the lower portion of its inlet end 11. The portion of the main passage A which extends from a short distance below the opening' 16 to the line B is cylindrical and its wall screw threaded, and the portion of this passage A from the line B up to the point indicated at C is taper screw threaded, the taper being a radual one. The remaining portion of` t e passage indicated at D,'may'serve as a means of attaching the inserting plug of the tapping machine, orA

for an. ordinary plug'to close the end of the cock after insertion `into a main and thereby prevent foreignvmatter from clogging4 the,

opening. Coperating with this casing is a plug valve 19 shown more particularly in Figs. `3 and 5. This plug valve is employed in connection with'a casing to open and close the cock. This valve 19 is shown provided with an inclined concave face 20 at one end thereof, while at its other end, it is provided With a recess 21 'for receiving a suitable tool such as a wrench, shown in Fig. 6, whereby the pluglmay' be moved toits various positionswit in the casing. This recess maybe of any desired shape to conform tothe operating tool employed and it may be interiorly screw threaded, if desired. This plug valve is shown exteriorl screw threaded for its entire length, the threaded top portion of which positioned between the line e-e and the end 21a thereof, bein preferably tapered toward said end 21, an designed to iit into and make a perfectly tight joint between the tapered screw threads situated between the lines BG of the casing. The remainder of the threaded portion of the plug valve is preferably cylindrical and so designed as to make a reasonably tight working connection with the screw threads positioned between the line B and the end 11, of' the casing. This plug valve is so designed that when it is moved by the operating tool 22 of Fig. 6, or any other suitable devices, toward the end '14 of the casing, said plug valve 19 will make a tight joint with the screw threads of the valve casing and at the same time permit a clear and unobstructed passage for fluid from the end 11 throughthe casing and out through the opening 16. The fluid will be guided in its passage by the concave face 20 of the plug.

To facilitate the adjustment of the plug valve by the workmen, a suitable indicating mark 23 may be provided on the casing, and a registering mark 24 on the plug valve may be employed so that when such marks 23, '24 are adjacent to each other, the operator will know that the inclined concave face 20 is in the proper position to obtain a clear passage throughl the casing from the inlet port 11 andvout through the port 16. When it is desired to close the cock,'the.tool 22 may be operated to direct the .plug valve 19 i from the end 14 until the longitudinal side 25 of said valve completely closes the'opening 16 thereof. The plug valve 19 is inserted through the end 11 until it engages with the screw threads ofthe channel of the casing, whereupon the plug may be turned and brought into operative position within the casing. The cock, therefore, comprises only two members, a casing and the plug 19 so that itvprecludes the'disarrangeare so commonly necessary in cocks of this type.

In operation, a hole is drilled ortapped linto a main or vessel in the usual manner by the plug valve to its closed position. .After the cock has been applied, the tapping machine can be removed from the main, and

a tapping machine and the plug `cock inv ment of many parts or adjustments which the cock can then be screwed tightly into position by an ordinary wrench engaging the polygonal head 18. The branch piping can now lbe connected to the end 15 of the casing in any desired manner. After this connection, the valve is opened by moving the member 19 toward the end 14 until the tapering screw threads thereof make a tight joint with the tapering threads of the casing and the indicating marks 23, 24 are brought into registration. The valve is then entirely opened and fluid may pass from the main out into the branch pipe to be supplied.

Having thus fully described my invention, what I claim as new and desire to secure by Letters Patent is:

l. A plug cock comprising a casing hav ing three openings and a longitudinal passage way, the walls of the latter of which are screw threaded and ta ered away from the inlet opening, and a p ug valve removably mounted within the casing, said plug valve being provided with screw threaded tapered walls for coperating with the screw threaded portion of the casing Vand an inclined face, whereby the turnlng of the plug on its axisl for substantially 180. will open or close the valve.

2. A plug cock comprising a casing having a longitudinal assage way and an outlet arranged radi lyl to the passage way, the walls of said passage way being screw threaded and tapered away rom the inlet opening, a plug valve removably mounted within the casing, said valve being provided with screw threaded walls for cooperating With the screw threaded portion of the casing and with an inclined and concave face, said plug valve operating to Open or close the passage way through the outlet, the concave inclined face directing the flow of liqing a longitudinal passage way, sai sage way providing an inlet for fluid an an uid from the longitudinal passage way to thev outlet, when the plug valve is 1in one position, and cutting `olf communication between the passage way and outlet when the plug valve is turned on its axis for substantially 180- degrees.

3. A plug cock comprising a casin havadjusting opening for the casing, an outlet port connecting with said passage way at an angle thereto, and a plug valve positioned within the casing and provided with an inclned face and means for moving said plug to open and close the outlet port, the walls of said passage way and plug being tapered toward the adjusting opening, whereby when the plug valve is moved to its opened position, the fluid passing through the cock will be prevented from escaping through the adjusting opening.

4. A plug cock comprising a casing having a longitudinal passage way andan varm having an opening at right angles to the casing, one end of said casing being tapered and screw threaded, the other .-end ofv the casing being provided with an external polygonal surface, means on the arm for connecting the cock with a conductor, and a plug valve mounted for rotary movement within said passage way, one end of said plug valve being substantially at right angles to the walls thereof, while the other end of the plug valve is dished and inclined with relation to said walls.

In testimony whereof, I aiiix my signature, in presence of two witnesses. t

THOMAS BERNARD DORNIN.'

Witnesses:

WALTER E. BLICK, v STANTON CLARKE. 

